Merge pull request #15 from stoewer/master

Improve models and JPA configuration

LGTM
Account: add many-to-many relationship to conferences
[sbt] add jdbc and anorm dependencies
[auth] add to/from DateTime converter for anorm
[db] Add database evolution for user and token tables
[auth] Replace InMemUserStore with db-backed store
Merge pull request #16 from gicmo/user_db

Looks OK
build.sbt: add dependency for scalatest
Model: add prePersist method that assigns uuids
ConferenceService: implementation of list() and listOwn()

Replace spec2 test with JUnit like scalatest
ConferenceServiceTest: actually test something
Merge pull request #17 from stoewer/master

ConferenceService: started implementation

LGTM
DBUtil: utility functions for service classes using JPA
ConferenceService: use DBUtil

Use DBUtil also in unit test
ConferenceServiceTest: remove println() calls
Model: change relationships from List to Set
JPA: switch from hibernate to eclipse link
ConferenceService: implement get() and create()

Unit test for new methods
Build: remove unused dependencies

- remove hibernate
- remove javaJpa